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From: defaria@hpcladb.HP.COM (Andy DeFaria)
Newsgroups: comp.lang.ada
Subject: Re: Re: "limitations" of conditional compilation
Message-ID: <920016@hpcladb.HP.COM>
Date: 15 Dec 89 20:05:53 GMT
References: <7398@hubcap.clemson.edu>
Organization: Hewlett-Packard Calif. Language Lab
Lines: 18

>   Hmmm... how about:
>
>      ALIGNMENT_LENGTH : constant := 2;   -- or 4, or whatever...
>
>      for RECORD_1 use
>         record
>            FIELD_1 at 0 * ALIGNMENT_LENGTH range 0..15;
>            FIELD_2 at 1 * ALIGNMENT_LENGTH range 0..15;
>            ...
>         end record;
>
>   The general form of the "at" expression seems to qualify as a
>   static_simple_expression (by 4.9.7 & 4.4.2, plus a similar 
>   example is given in 13.4.9), and the coding of the for clause 
>   would seem to be relatively straightforward.

It's the old "who came first? the chicken or the egg" syndrone.  How do you
define ALIGNMENT_LENGTH?  Its 2 on some machines and 4 on others.